Ocean Cleanup – Pliosaur Energy

Integrated environmental function

Renewable energy with debris recovery

Plastic pollution has become one of the greatest environmental challenges facing the world's oceans.

While Pliosaur Energy's primary purpose is to generate renewable electricity from tidal streams and ocean waves, the platform has also been designed to provide an opportunity to recover floating plastic waste and other marine debris during normal operation.

Although the quantity recovered will depend on local environmental conditions, the concept demonstrates how renewable-energy infrastructure could contribute both to reducing greenhouse-gas emissions and improving the health of marine environments.

Isometric view of a Pliosaur Energy turbine array fitted with debris-collection screens — Isometric view of a turbine array fitted with debris-collection screens.

Collection process

Intercepting debris before the turbine

Wave energy is captured by allowing overtopping water to flow into an elevated reservoir before passing through the turbine.

As part of this process, the water first passes through a debris-collection screen positioned across the overtopping channel.

Floating plastics, discarded fishing gear, timber and other marine debris can therefore be intercepted before entering the reservoir and turbine.

Turbine debris-collection screen with an access walkway positioned above it.

Maintenance and recovery

Accessible collection and responsible disposal

The screen is designed to remain accessible from the platform's service walkway, allowing routine inspection and cleaning during scheduled maintenance visits.

Collected waste can then be transferred ashore for disposal or recycling through recognised waste-management facilities.

For projects owned and operated by Pliosaur Energy, recovered plastic and inorganic debris will be removed from the marine environment wherever practical.

Where the technology is licensed or operated by third parties, equivalent debris-management requirements would form part of the commercial operating agreement.

Established precedent

Floating debris collection in practice

Floating collection systems are already used to intercept waste in rivers and tidal environments before it travels farther downstream or enters the open sea.

These systems demonstrate the practical value of positioning accessible collection equipment within naturally occurring water flows.

Pliosaur Energy applies a related principle by integrating debris interception into the operating pathway of its wave-energy system.

Floating debris collector operating on the River Thames — River Thames floating-debris collector.
Photograph by A. Cooper Photography, London.